Home / 393,966,953.28-543,685,957.68-215,360,711.28

Finding the Fourth Proportional to 393,966,953.28, 543,685,957.68 and 215,360,711.28

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Solution

The fourth proportional to 393,966,953.28, 543,685,957.68 and 215,360,711.28 is: 297,204,101.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,966,953.28 : 543,685,957.68 = 215,360,711.28 : x
  2. Step 2: Convert to fraction form
    393,966,953.28/543,685,957.68 = 215,360,711.28/x
  3. Step 3: Cross multiply
    393,966,953.28x = 543,685,957.68 × 215,360,711.28
  4. Step 4: Simplify right side
    393,966,953.28x = 117,088,594,558,912,768
  5. Step 5: Solve for x
    x = 117,088,594,558,912,768/393,966,953.28
  6. Step 6: Final answer
    x = 297,204,101.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.